INDEX. 



The page oiumhers in bold type indicate illustrations. 



Abano, Sphferotilus in hot springs at, i. 554. 



Abele. See Populiis alba. 



Abies, and Witches' Broom, ii. 526. 



— axillary biuls, ii. 29. 



— fertilization, ii. 420. 



— green cotyledons, ii. 622. 



— needles, ii. 125. 



— pollen storing and dispersion, ii. 145. 



— protection of ovules, ii. 72. 



Abies excelsa and galls of Chermes abietis, 



ii. 544. 



cone characteristics, ii. 725. 



egg-cells, ii. 419. 



embryo development, ii. 438. 



flower-opening constant, i. 559. 



Pine-apple Gall on twigs, ii. 534. 



stamen, ii. 87. 



various dimensions, i. 722. 



vertical range, i. 527. 



Abies Orientalis, cotyledons, i. 621. 

 Abies pectinata, i. 717. 



and .iEcidiura elatinum, ii. 523, 527. 



annual rings and sinkers of Mistletoe, 



i. 210. 



bract scale, ii. 440, 441, 721. 



cone, ii. 441, 721, 725. 



embryo development, ii. 438. 



ovuliferous scales, ii. 441. 



Abietinese, arrangement of scales, ii. 440. 



— distinguishing feature, ii. 721. 



— embryo development, ii. 438. 

 Abronia, unequal cotyledons, i. 622. 

 Absorbent cells, i. 765. 



of cotyledons, i. 599, 600. 



Absorption bands of chlorophyll spectrum, i. 



372. 

 Absorption-cells, i. 87, 217. 

 capitate or glandular, of multicellular 



hairs, mode of action, i. 229. 



controlling influences, i. 90. 



form of, i. 86. 



fungal hyph;e a substitute for, i. 249. 



in Leucobryum, &c., i. 86. 



in Nepenthes pitcher, i. 135. 



in special cavities and grooves in leaves, 



i. 230. 



of Bartsia, i. 180. 



of Cuscuta, of Cassythse, i. 176. 



of foliage-leaves, other than trichomes, 



restricted action, i. 230. 



of Lathriea, i. 182. 



of leaves, conditions of action, i. 227. 



of Mildews, i. 166. 



of Orchid aerial roots, i. 223. 



of Plagiothecium, i. 85. 



of Rhinanthacea;, i. 178. 



of roots, permeability, &c., 1. 226. 



of Saprophytes, i. 114. 



of Stellaria media, i. 228. 



of Thesium, i. 177. 



of Utricularia bladders, i. 121. 



of water-receptacles, proof of acting as 



such, i. 240. 



on leaf-cuttings, ii. 42. 



on leaves of Tamarisks, Frankenias, &c., 



mode of development, i. 236. 



position of, i. 88. 



replaced by mycelium, 1. 91. 



shape in relation to food-supply, &c., 



i. 90. 



Absorption of food-salts, i. 85. 



— of rain and dew, by foliage-leaves, i. 225. 



— of water by foliage-leaves, i. 232. 

 Absorption-roots, of Saprophytes, i. 115. 

 Absorptive cavities and cups on foliage- 

 leaves, i. 233. 



— organs, of some Plumbaginese, i. 234. 

 Alju-Arisch, Arabia, shade temperature, i. 



556. 

 Abutilon Avicennse, autogamy, ii. 355. 



cross-fertilization, ii. 3u4. 



Acacia. See also Eobinia Pseudacacia. 



— pollen-chambers, ii. 90. 



— popularly so called, i. 534. 



— reception of insects, ii. 230. 



— root-slips, ii. 28. 



— scent, ii. 201. 



— true, diurnal positions of leaves, i. 534. 



— improtected pollen, ii. 107. 



Acacia cafEra, ,S;o., hosts of Sarcophyte, i. 



196. 

 Acacia lophantha, Australia, leaf, diurnal 



positions, i. 534. 

 Acacia spadicigera, niyrmecophilous, ii. 233. 

 Acacia sphaerocephala, myrmecophilous, ii. 



233. 

 Acacias, Australian, coloured stamen fila- 

 ments in, ii. 183. 



distribution of stomata on phyllodes, i. 



281. 



leaf metamorphoses, i. 637. 



phyllodes, i. 335. 



wax on leaves, &c., i. 292, 312. 



Acalypha, stamen, ii. 87. 

 Acanthacea^, ii. 771. 



— and cold, i. 545. 



— inflorescence, i. 746. 



— pollen-sprinkling apparatus in, ii. 271. 



— scarlet flowers in, ii. 196. 

 Acantholimon, absorptive organs, i. 234. 



— acicular leaves, i. 434, 437. 



— and spiny Tragacanth-shrubs, Persian 



steppes, i. 435. 



— calcareous incrustation, i. 237. 



— habitat, i. 235. 



Acantholimon Senganense, absorptive or- 

 gans, &c., i. 235. 



leaf, and section of part, i. 233. 



lime incrustations, i. 235. 



Acanthophylhim, leaves, i. 434. 

 Acanthus, and insect visits, ii. 223. 



— colour -contrast in flower, ii. 191. 



— cross-fertilization, ii. 304. 



— emerging of leaves from soU, i. 639. 



— honey protection, ii. 241. 



— pollen-sprinkling apparatus, ii. 273. 



— protection of pollen from wet, ii. 110. 

 Acanthus longifolius, flower, and pollen- 

 sprinkling apparatus, ii. 273. 



Acanthus mollis, habit, ii. 772. 



mildew of, i. 166. 



seed-dispersal, ii. 833, 835. 



Acanthus spinosis.simus, i. 437. 



Acanthus spinosus, pollen-sprinkling, ii. 273. 



Acanthus spinulosus, hybrid of A. mollis x A. 



spinosissimus, ii. 586. 

 Acarina, i. 138. 



Acarospora glaucocarpa, habitat, i. 117. 

 Acarus, prey of Utricularia montana, i. 123. 

 Acaulescent Gentians, autogamy, ii. 387. 



Acaulescent Violas, eleistogamy, ii. 393. 

 Accessory organs, of flowers, ii. 71. 



— svibstances, of plants, i. 460. 



Acer and Gleditschia triacanthos, struggle for 

 existence, ii. 515. 



— and Nectria, ii. 678. 



— arrangement of foliage-leaves, i. 92. 



— colour of flowers and flies, ii. 197. 



— from chalk, ii. 613. 



— green cotyledons, i. 622. 



— hybrids in, ii. 584. 



— mechanical tissue arrangeaient, i. 729. 



— roots, i. 753. 



— texture of so-called mite-galls, ii. 532. 



— vernation, i. 350. 



Acer campestre, mite-galls, ii. 529. 



Acer Monspessulanum, seed-dispersal, ii. 



853. 

 Acer platanoides, distribution of sexes, ii. 



297. 



flower-opening constant, i. 559. 



leafy twig, i. 416. 



normal and sucker leaves, ii. 516. 



seedling, i. 9. 



twig and elongation of leaf-stalks, i. 



419. 



venation, i. 631. 



Acer Pseudo-platanus, distribution of sexes, 



ii. 297. 



imperfect flowers, ii. 295. 



Acer rubrum, i. 488. 



Aoeras and Orchis, hybridization, ii. 583. 

 Acerosie, of Braun, ii. 605. 

 Acetabularia, colonies, i. 585. 



— marine lime accumulators, i. 261. 

 Acetabularia mediterranea, structure, &c. 



ii. 646. 

 Acetabularise, differentiation of thallus, ii 



646. 

 Acetic acid, from alcohol, i. 506. 

 Achene, embryo protection, ii. 450. 



— nature of, ii. 429. 



— of Gnaphalium alpinum, ii. 84. 

 Achenes, with pappus, ii. 432. 

 Achillea, hybrids, ii. 585. 



— peripheral flowers, ii. 187. 



Achillea Clavennse, habitat and hairiness, i. 



316. 

 Achillea Millefolium, authocyanin, i. 522. 



gall-mites and flower metamorphosis, 



ii. 548. 

 Achillea ochroleuca, i. PI. VI. 

 Achimenes, ternary hybridization, ii. 560 

 Aclilya, asexual zoospores, ii. 480. 



— fruit, &c., ii. 480. 



— host for Saprolegniacese and Chytridese, i. 



170. 

 Achlya lignicola, sexual organs, ii. 671. 

 Achlya prolifera, on flies and fishes, i. 105. 



sporangia, &c., ii. 17. 



swarra-spore formation, ii. 669. 



Achlya racemosa, host of Rhizidiomyces 



apophysatus, i. 170. 

 Achorion Schoenleinii, cause of ringworm, 



i. 168. 

 Acid, acetic, from alcohol, i. 506. 



— butyric, i. 463 ; ii. 623. 



— caproic, ii. 202. 



— carbonic. See also Carbonic acid. 

 dissociation by symbiotic Alga?, i. 254. 



